HS X.25 is a software library in C (supplied with full source code) which implements ITU-T recommendation X.25. Includes RFC1613 Cisco XOT module for X.25 over IP applications. HS X.25 is a software library in C (supplied with full source code) which implements ITU-T recommendation X.25 - Interface between Data Terminal Equipment (DTE) and Data Circuit-terminating Equipment (DCE) for terminals operating in the packet mode and connected to public data networks by dedicated circuit. HS X.25 incliudes RFC1613 Cisco XOT protocol for X.25 over TCP applicaitions.